** See Edits note below ** Hi. I inherited, with only target grips, my father's 1957 S&W (pre-10) M&P "Blue" 38 Special 4"bbl revolver (Serial C-3710xx). Seeking original/stock grips, I bought a pair of new-looking "OEM" grips on eBay but they are a bit too big for the piece. I've thought that...